From 124db3274fb9099bc1f15521c9a92d5fc6773611 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steven.silvester@ieee.org>
Date: Sat, 4 Oct 2014 15:58:28 -0500
Subject: [PATCH] Fix error in viewer test when mpl is present but not qt.

---
 skimage/viewer/utils/core.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/skimage/viewer/utils/core.py b/skimage/viewer/utils/core.py
index 19a5c73d..90521f9c 100644
--- a/skimage/viewer/utils/core.py
+++ b/skimage/viewer/utils/core.py
@@ -15,6 +15,9 @@ try:
         if 'agg' not in mpl.get_backend().lower():
             print("Recommended matplotlib backend is `Agg` for full "
                   "skimage.viewer functionality.")
+    else:
+        FigureCanvasQTAgg = object
+        LinearSegmentedColormap = object
 except ImportError:
     FigureCanvasQTAgg = object  # hack to prevent nosetest and autodoc errors
     LinearSegmentedColormap = object